In message , at 07:52:12 on
Sat, 19 Nov 2011, Robert Neville remarked:

Why does a tram system need complicated signalling?

In the US, they tend to be integrated with the standard traffic signals so that
the tram can be given priority at intersections and street traffic doesn't
impede or run into a tram vehicle.

Exactly like that in Nottingham.
--
Roland Perry